核心考点八 情态动词与虚拟语气
——使表达得体、含蓄
1．(2013·北京，35)—You needn't take an umbrella.It isn't going to rain.
—Well, I don't know.It________do.
A．might B．need C．would D．should
解析 考查情态动词。第一个人说不会下雨，第二个人回答I don't know，因此可知，到底下不下雨是不能肯定的事情，故使用might表推测“有可能”。
答案 A
2．(2013·辽宁，31)Harry is feeling uncomfortable.He________too much at the party last night.
A．could drink B．should drink
C．would have drunk D．must have drunk
解析 考查情态动词。此处考查情态动词对过去发生事情的推测。句意：Harry感觉不舒服。昨晚的聚会上他肯定喝得不少。对过去发生事情的肯定推测，用must have done，故选D。
答案 D
3．(2013·四川，5)—Why are your eyes so red？You________have slept well last night.
—Yeah，I stayed up late writing a report.
A．can't B．mustn't C．needn't D．won't
解析 考查情态动词。根据语境“眼睛那么红，昨晚不可能睡得很好”可知，此处考查情态动词can的否定式can't表推测，意为“不可能”。can't have done表示对过去的推测，意为“过去不可能……”。故选A。
答案 A
